arrayList java

[RBH]

i have this problem to develop in java

i have a classe descriptor (sigle : string, value: num)

a problem is composed of liste of descriptor

my fct main must do this first

1- tell to client to introduce descriptor one by one

=> there'is fct getDescriptor in Classe problem

after i must tell to client then to introduce sigle and value of all the
descriptor

remarq in the class problem i have this declaration

an arraylist ListDescPrb